For octave up/down, this pedal is worse than a BOSS or DOD. The tracking is just awful. You can hear it struggling to find the matching notes and when it does, the sound is not pleasant. If you play double-stops or chords, it doesn't work at all.

The square wave is not. It is more like a very unpleasant distortion sound that I cannot imagine would ever be useful (there's certainly no low-end to the sound that is produced). The BOSS Bass Synth—which is not a good pedal—is better than this.

If you are looking for octave up/down for your bass, please try a POG. THAT tracks well, handles polyphony, and is much sturdier built. For "bass synth", I think science has yet to provide a solution for us, so you are stuck with using an actual synth or footpedals.

I was originally in the market thinking to buy a fuzz pedal, and all of that fell away upon hearing this amazing piece of equipment. It's been two weeks since this arrived and I'm still finding new sounds and tweaks to tone putting in 2-3 hours a day of practice time. I own a Boss BD-2 and an AC-3 (Blues overdrive and Acoustic Simulator) and the combinations from the 3 effects together spiral out of control. Only cons here are the manual that came with this pedal explicitly says to use a separate power jack supply than your other pedals, which was a bit of a hassle to free up more space in my tiny studio. The trigger function on the leftmost side of the pedal is key: dial it in to how hard you play and watch the magic happen. A truly excellent, sturdy, worthwhile buy for serious musicians looking to increase their sound.

I was really disappointed in this one for the price. No presets of course. My main interest was having upper octave tracking and this was lame. It was also full of clicking and clipping noise for much of the settings. It's not a giggging musicians pedal since most of what it does is inane to supporting the trio I play in. you may want to try it out first and save the grief of returning it.

I worried it'd get limited use, but I get a wide range of sounds from it.The Electro-Harmonix Bass MicroSynth is on the expensive side, but it's a bargain if you get it instead of a classic monosynth. In addition, the sub octave is the cleanest and best sounding one I've ever tried. There's no tracking delay because it's an analog effect, and in my opinion, it beats the POG for tracking accuracy and sound quality. The high octave is kind of a thin octave fuzz, so you don't start hearing the true octave up until you're pretty far up the neck, but it's a great sound, and regardless of where you play on the neck it blends well with the other sliders. The filter section is simple but very adaptable. Overall it's an aggressive sounding pedal, but it can be mellowed with other effects and EQ.

when I first plugged in this pedal I was absolutely blown away. The filter controls are heaps of fun but where this pedal truely shines I feel is with everything (bar trigger and rate) fully cranked. You get huge didtortion from doing this. so many times I've seen bass players switch on their distortion pedals and loose nearly everything. The sub octave will replace any lost tone and the above octave makes it really cut and sound very synthy. I almost think that there should be no more bass dist pedals made without sub octave built into them... don't even give them a dial for it just have it built in as a defult setting. My only complaint is that it feels like it gonna break my amp

With this pedal, it's very easy to feel cheated or discouraged because it's just so damned expensive. However, you will get sounds out of this that you would never expect and it's very good for progressive stuff and industrial (possibly even noise-rock, though I never tried). The distortion you can get out of the square waves is great and it isn't quite what i was expecitng with the synth sounds, but it's still impressive. It also really makes other pedals shine (I could go on for hours about what it does with delay, phasers, chorus and flangers). This is a great, sturdy, attractive pedal (though the model before this one was nicer to look at), but it's not something to buy on a whim. Know what you're looking for before you grab it. If you want something aggressive and out of the norm, this is for you.

I wish I bought this sooner; I play using an fender american standard jazz (haven't tried it with my active bass yet), and couldn't be happier with the sounds I'm able to dial up. I had the boss bass synth years ago, but find this pedal far better (I'll also probably get rid of my dod envelope filter now too). The sliders on the EH synth pedal make it look complicated, but you actually end up finding lots of cool settings without trying too hard, which is a plus if you're lazy. The octave and sub-octave effects really fill out your sound, and the filter sweep area is fun to play around with. The rate and attack delay sliders both work very well also.

For what this pedal does, it's pretty pricey. I mean, it's kinda like having several pedals in one, but still dropping that amount on a pedal just makes it difficultThe octaves are great, and If i had the money to buy this pedal, that'd be my main motivation. I really like having the upper and lower octave choices, and it can handle the E string, which has always been my problem when using sub-octave effects. The square wave is pretty cool, but i prefer my MXR blowtorch fuzz. The filter section sounds and works great with really simple operation. One thing though, not a complaint against this pedal in particular but most, i wish there was a sweep setting like on a guitar phaser, so it would pulse in both directions. Not a big complaint. Sturdy pedal, no complaints other than that big price tag.